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On the encounter desorption of hydrogen atoms on an ice mantle

文献类型：期刊论文

作者Chang, Qiang1; Zheng, Xu-Li2; Zhang, Xia2; Quan, Dong-Hui2,3; Lu, Yang4; Meng, Qing-Kuan1; Li, Xiao-Hu2; Chen, Long-Fei2
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2021-03-01
卷号21期号:2页码:39
关键词astrochemistry ISM abundances ISM molecules
ISSN号1674-4527
DOI10.1088/1674-4527/21/2/39
产权排序1
英文摘要At low temperatures (similar to 10 K), hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules, which cover a notable fraction of grain surface. The desorption energy of H atoms on H-2 substrates is much less than that on water ice. The H atom encounter desorption mechanism is adopted to study the enhanced desorption of H atoms on H-2 substrates. Using a small reaction network, we show that the steady-state surface H abundances predicted by the rate equation model that includes H atom encounter desorption agree reasonably well with the results from the more rigorous microscopic Monte Carlo method. For a full gas-grain model, H atom encounter desorption can reduce surface H abundances. Therefore, if a model adopts the encounter desorption of H atoms, it becomes more difficult for hydrogenation products such as methanol to form, but it is easier for C, O and N atoms to bond with each other on grain surfaces.
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资助项目National Natural Science Foundation of China[11673054] ; National Natural Science Foundation of China[11973075] ; National Natural Science Foundation of China[11973099]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000631499300001
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
资助机构National Natural Science Foundation of China
源URL[http://ir.xao.ac.cn/handle/45760611-7/3961]  
专题天体化学研究团组
通讯作者Chang, Qiang
作者单位1.Shandong Univ Technol, Sch Phys & Optoeletron Engn, Zibo 255000, Peoples R China
2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
3.Eastern Kentucky Univ, Dept Chem, Richmond, KY 40475 USA
4.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China
推荐引用方式
GB/T 7714		 Chang, Qiang,Zheng, Xu-Li,Zhang, Xia,et al. On the encounter desorption of hydrogen atoms on an ice mantle[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(2):39.
APA Chang, Qiang.,Zheng, Xu-Li.,Zhang, Xia.,Quan, Dong-Hui.,Lu, Yang.,...&Chen, Long-Fei.(2021).On the encounter desorption of hydrogen atoms on an ice mantle.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(2),39.
MLA Chang, Qiang,et al."On the encounter desorption of hydrogen atoms on an ice mantle".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.2(2021):39.

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来源：新疆天文台

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